Our Versant 2100 is printing lines/marks when using duplex print. This happens because the 2nd BTR can't clean the waste/extra toner before printing the other side. It's far worse on coated paper than uncoated paper.
We are currently switching between 2nd BTR's. We use one 2nd BTR for coated paper and another one for uncoated paper. For coated paper we're using Xerox Colour Impressions Silk and the 2nd BTR only lasts for about 10K impressions. Coated paper is too sensitive for the 2nd BTR roller. The 2nd BTR roller is made of soft rubber/plastic and appears to be pretty weak/fragile as lines/marks appear on the roller after a few uses. Other printers usually don't have problems like this. Fx. Xerox C75. They use softer 2nd BTR rollers that don't get damaged like the ones on the Versant series.
This states that the Versant printers have a huge production fault with 2nd BTR's. Because they basically can't print on coated paper. Xerox must produce a new version of the 2nd BTR's because the Versant machines clearly aren't working as they should be.
Does anyone know if a new type of 2nd BTR is in the making or on the market?
There are a lot of researching in progress for improving the quality of 2nd BTR and there is a new part no. just for tests for the moment.
Yeah, heard that one before! "Researching" has been ongoing for the past 4+ years, yet Xerox have not offered any improvement. In fact, it is worse on the newer machines (worse on our V180 than our old V80). Twice now, we've even had an engineer replace the 2nd BTR with a brand new unit, only for the first sheet out to have the problem, worse than the unit removed. Had to be replaced again. We've tried various revisions, but the problem remains. Our Xerox techs have also installed various scripts which are supposed to improve the issue, but haven't (latest update was on Monday).
I don't think the 2nd BTR is the root issue - there are other factors involved, and I don't mean paper. Like why is so much waste toner ending up in the 2nd BTR in the first place? We have to change the waste toner cartridge more frequently on our V180 than the V80. The last one was full after one week! Also, you can see the colour patches in some cases where the streaks are - these should be getting cleaned off the image transfer belt by the cleaning blade.
It is also wrong to say it only affects duplex jobs. It is more obvious, yes, but on single sided jobs you will also get the streaking on the reverse of the printed side. We get it on uncoated paper too, particularly on 250gsm+.
When it comes to coated paper, we keep following recommendations, to no avail, in this order over the years:
We've seen the problem on all, to differing levels, but weight seems to be a factor also. 300gsm silk is a 2nd BTR killer for us. Xerox have even advised us not to use Xerox Colour Impressions Silk! I guess we all get told to use the expensive Xerox Colotech+ Coated Silk as that is ok, but I have seen it on that too, albeit to a much lesser extent (probably because it is almost like a smooth uncoated stock rather than silk).
Referring to the HFSI counter (clicks are half that, I think), our average is/was probably around 140K. Record is about 210K, IIRC, on our V80. This generally equated to a service call once a month. On the V180 it has been worse. When we first got it a year ago, the 2nd BTR had to be changed within a week. Last one was changed 2 weeks ago at 60K, but the new started playing up after a week. We tend to find job specifics are a factor - i.e. low or high coverage, or heavyweight stock. There is also a lot of variability in the quality of a new 2nd BTR. Xerox try to fit V80 units to ours whenever they can, because the V180 spec units do not last as long.
To start with the streaking is recoverable and the machine will clean it up when running a different stock, but sooner or later, the streaks get embedded on the roller and no amount of cleaning with isopropyl alcohol will keep the streaks away. For example, ran 2,500 sheets duplex 300gsm silk where it started marking within 500 sheets. Later, on same 2nd BTR, ran 3,000 sheets duplex 150gsm and 130gsm with no streaking whatsoever. All on the same paper brand.
I agree, it is a pain having to monitor jobs - usually we catch it in time, and have an idea what job it could happen on, or an early warning, but sometimes it can go unnoticed for 1-2,000 sheets, which is a big problem. Some of our engineers blame the paper, some not so much, but all acknowledge there is an issue with early 2nd BTR failures. My guess is Xerox know what the problem is, but either don't know the solution or know it is a design drawback that is not fixable, otherwise they surely would have fixed it by now or at least made some progress. They're not going to make a public statement admitting ta design fault for obvious reasons.
So the new part number for the 2nd btr is 0859K7313 (old one is 0859K7312). You will see a 2.0 stamped on the metal guide plate on top.
So the new ones last to about 150k-225k for me. They are much more stable than the old ones but they still need cleaning. Like the other members posted, there are a ton of other factors. The IBT cleaner also fails prematurely but I'm starting to believe that it has to do with the charge on the toner. As for me, I primarily run coated stock (99% of my prints). Its not just the coated stock it happens on, it also happens on the uncoated stock. I have done everything from taking out the cleaning blades (on both the ibt cleaner and the 2nd btr) and vacuuming out all toner but I still get it.
And you should be getting the streaks on the non-operator side (towards the back of the machine) correct?
There is some new script being tested that will apply to the 2nd btr (I'm guessing its to tweak the charge/voltage). Hopefully that will resolve the problem or make it better. Like you said previously, this is a HUGE engineering fault. The 2nd btr used to be a softer roller, and the backup roller used to be the harder one. Don't know why they switched them. I used to be able to use it WAY past life on my J75.
Its a widespread issue so you're not the only one thats experiencing this. Hang in there, and happy holidays!
Our Newest 2nd BTR just lasted less than 3K clicks!
We change 2nd BTRs depending on what type of job we do. Fx. if we do uncoated paper we normally use an old 2nd BTR, because the lines/strikes arent visible on that paper. We only used the newest 2nd BTR with Xerox Colour Impression Silk 250gr. After less than 3K clicks we noticed lines/strikes on the paper.
This pretty much feels like a scam by Xerox.
Same old, same old here. The last brand new BTR the tech installed before Christmas had to be swapped out again before tech left as it was streaking from the start. The replacement has been manageable until this week - Xerox tech coming Monday to replace. Over 200K which is a record on our V180. I know the cleaning blade is due for replacement too and our techs tend to always replace when they put a new 2nd BTR in.
We were told not not to use Xerox Colour Impressions Silk anymore and have moved to Silver Digital Matt instead, which is better, but not the magic paper that Xerox insist exists. Interesting that you mention 250gsm - IMHO, the paper thickness is a contributing factor, along with the smoothness. If you use something like Image Impact Plus 250gsm (aka Pro Design), it will mark a lot compared to Image Impact 250gsm which is not as smooth, despite both being uncoated.